« previous next »

Author Question: What is the mechanism for the three-part differential found in older Coulter machines or those ... (Read 27 times)

pragya sharda

  • Hero Member
  • *****
  • Posts: 566
on: Jun 25, 2018
What is the mechanism for the three-part differential found in older Coulter machines or those designed for smaller laboratories?
 
  a. Volume, conductivity, scatter
  b. Multiangle polarized scatter separation
  c. Peroxidase staining and light scatter
  d. Impedance after cytoplasm shrinkage

Question 2

How do CELL-DYN instruments differentiate red cells and platelets from one another?
 
  a. Differences in forward scatter using optical light scatter principle
  b. Use of a unique reagent that selectively lyses red cells while preserving platelets
  c. Differences in volume (fL) using electrical impedance principle
  d. Use of a unique reagent that selectively lyses platelets while preserving red cells


Zack0mack0101@yahoo.com

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: D
Older Coulter instruments use a special white blood cell (WBC) lysing agent that causes differential shrinkage of white cells, allowing the different white cells to be counted and sized based on their impedance.

Answer to Question 2

ANS: C
CELL-DYN instruments use electrical impedance for counting and discriminating red cells and platelets. Pulses between 1 and 35 fL are included in the initial platelet data, whereas pulses greater than 35 fL are counted as red cells.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

A pet dog taking part in Christmas traditions A pet dog taking part in Christmas traditions
These older adults are participating in an exercise class at their assisted-living facility These older adults are participating in an exercise class at their assisted-living facility
Transurethral resection of the prostate (TURP). As a treatment for BPH, part of the prostate gland i Transurethral resection of the prostate (TURP). As a treatment for BPH, part of the prostate gland i
Structure and swinging arm mechanism in the mammalian fatty acid synthase complex Structure and swinging arm mechanism in the mammalian fatty acid synthase complex
Vitamins Found Widely in the Food Groups Vitamins Found Widely in the Food Groups
Some of the common structural abnormalities seen in chromosomes. (a) In a deletion, part of a chromo Some of the common structural abnormalities seen in chromosomes. (a) In a deletion, part of a chromo
Video: Epinephrine/NE (heart rate, altered blood flow, glycogenolysis & bronchodilation)

For a complete list of videos, visit our video library